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公开(公告)号：US20230133796A1
公开(公告)日：2023-05-04
申请号：US17544742
申请日：2021-12-07
申请人： VIAVI SOLUTIONS INC.
发明人： Jong-Min KIM , Hyuck-In KWON , Young-Kill KIM , Sung-Hwa IM , Jae-Gab LEE , Yoo-Chul SHIN
IPC分类号： H04L5/14 , H04B17/345 , H04L5/00
摘要： A test device is operable to detect interference in a time division duplex (TDD) cellular network. The test device can automatically detect a TDD frame structure of RF signals received over the air Eagle Eye from a cell site. The test device determines a transition period between uplink (UL) and downlink (DL) transmissions in which no UL and DL signals are being transmitted based on the TDD frame structure. An interference signal is detected during the transition period, and the test device can generate a display of the spectrum during the transition period that includes the interference signal.
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公开(公告)号：US20230112451A1
公开(公告)日：2023-04-13
申请号：US17663960
申请日：2022-05-18
申请人： Viavi Solutions Inc.
摘要： An antenna alignment apparatus may include magnetic field sensors as an alternative to or in addition to GNSS sensors. The magnetic field sensors may measure the earth's magnetic fields at corresponding locations, and a processor may use the measurements to calculate at least one of a roll, tilt, or azimuth of an antenna. A declination based on GNSS based alignment and magnetic field sensor alignment may be stored for an adjustment of magnetic field sensor based azimuth calculations. For an optical alignment, the antenna alignment apparatus may, additionally or alternately, include a reference object (e.g., a printed mark or a physical stud) located within a field of view of a camera. A location of the reference object may indicate the alignment of the antenna vis-à-vis the structures within the field of view.
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公开(公告)号：US20230092919A1
公开(公告)日：2023-03-23
申请号：US17929928
申请日：2022-09-06
申请人： Viavi Solutions Inc.
发明人： Dexin SUN , Raleigh B. STELLE, IV
摘要： An ultra-wideband mobile mount antenna with a capacitive ground structure-based matching structure. The antenna has a return loss better than 10 dB over an operating frequency range of 250 MHz to 1220 MHz.
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公开(公告)号：US11601829B2
公开(公告)日：2023-03-07
申请号：US16938668
申请日：2020-07-24
申请人： VIAVI SOLUTIONS INC.
摘要： A modular test instrument for performing tests and measurements in a network is disclosed. The modular test instrument may include a modular processing unit comprising a processor and memory, the modular processing unit connectable to at least one modular test unit or modular test subunit. The modular test instrument may also include a modular display unit connectable to the modular processing unit or the modular test unit. Display modularity may enable quick and cost-efficient display replacement when damage, malfunction, or failure is incurred. Furthermore, the modular test instrument may include an additional modular test subunit connectable to at least one of the modular processing unit or the modular test unit. When the modular processing unit is fitted with the modular display unit, the modular least, or modular test subunit, for example, the modular test instrument may form an integrated test instrument for performing any number of tests and measurements associated with installation, troubleshooting, or maintenance of a long-term evolution (LTE) or 5G network.
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公开(公告)号：US11598884B2
公开(公告)日：2023-03-07
申请号：US17542172
申请日：2021-12-03
摘要： A navigational apparatus and method for augmenting a GNSS signal to the GPS simulator with alternative position, navigation, or timing (PNT) data, wherein the GPS simulator encodes an RF-simulated GPS signal based on the alternative PNT data when the GNSS signal is not available or is denied. The alternative PNT data may be provided by one or more of an Inertial Measurement Unit, Inertial Navigation System (IMU/INS) module and oscillator coupled to the GPS simulator.
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公开(公告)号：US11585985B2
公开(公告)日：2023-02-21
申请号：US17305902
申请日：2021-07-16
申请人： VIAVI Solutions Inc.
发明人： Kevin Cassady
摘要： An optical fiber inspection system may include an alignment guide having a sleeve portion and a mechanical key structure. The sleeve portion may comprise a first opening arranged to be proximal to one or more optical components in an inspection device and a second opening arranged to be distal to the one or more optical components when the alignment guide is removably engaged with the inspection device. The mechanical key structure may be located adjacent to the second opening and have a shape to engage a geometry of one or more recesses in a bulkhead. Accordingly, the alignment guide may stabilize the inspection device at a particular angle relative to an end face of an object in a field of view of the one or more optical components when a shaft of the inspection device is inserted into the bulkhead.
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公开(公告)号：US20230052023A1
公开(公告)日：2023-02-16
申请号：US17885913
申请日：2022-08-11
申请人： VIAVI SOLUTIONS INC.
发明人： Wei CHEN , Nick GHAEMI , Hyuck-In KWON , Jin-Ook KIM
IPC分类号： H04L43/0852 , H04L41/22
摘要： A test device for performing a bling scan includes a digital blind scan circuit. The blind scan circuit includes digital detectors for multiple cellular technologies that simultaneously perform correlation in a baseband frequency range to detect whether received RF signals include a channel of the technologies. The test device launches, responsive to detecting a channel from the blind scan, a signal analysis or a spectrum analysis application for the channel according to a carrier frequency and a technology identified for the channel by the blind scan.
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公开(公告)号：US20230050598A1
公开(公告)日：2023-02-16
申请号：US17975091
申请日：2022-10-27
申请人： Viavi Solutions Inc.
发明人： Julien BARRIER
IPC分类号： H04B10/071 , G01M11/00
摘要： In some examples, automatic OTDR-based testing may include determining, based on analysis of a signal that is received from a DUT that is to be monitored, whether the DUT is optically connected. Based on a determination that the DUT is optically connected, a measurement associated with the DUT may be performed.
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公开(公告)号：US11561166B2
公开(公告)日：2023-01-24
申请号：US17249572
申请日：2021-03-05
申请人： VIAVI Solutions Inc.
发明人： Lan Sun , Changmeng Hsiung
摘要： A device may obtain a master beta coefficient of a master calibration model associated with a master instrument. The master beta coefficient may be at a grid of a target instrument. The device may perform constrained optimization of an objective function, in accordance with a set of constraints, in order to determine a pair of transferred beta coefficients. The constrained optimization may be performed based on an initial pair of transferred beta coefficients, the master beta coefficient, and spectra associated with a scouting set. The device may determine, based on the pair of transferred beta coefficients, a transferred beta coefficient. The device may determine a final transferred beta coefficient based on a set of transferred beta coefficients including the transferred beta coefficient. The final transferred beta coefficient may be associated with generating a transferred calibration model, corresponding to the master calibration model, for use by the target instrument.
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公开(公告)号：US11554603B2
公开(公告)日：2023-01-17
申请号：US17301810
申请日：2021-04-15
申请人： VIAVI Solutions Inc.
发明人： Cornelis Jan Delst , Vladimir P. Raksha , Paul G. Coombs , Robert B. Sargent , Michael Ray Nofi
IPC分类号： B42D25/36 , B42D25/369 , G02B5/09 , B42D25/378 , B42D25/373 , B42D25/425 , B42D25/29
摘要： The disclosure relates to an optical security feature that is based on a single axis alignment of mirrors or facets in a structured surface that forms a micro mirror array. In an aspect, a device is described that includes a reflecting structure on a first layer, where the reflecting structure has a top surface with multiple embossed facets arranged in a spatial orientation that produces a flat ring optical effect upon incidence of light. In another aspect, a method for making the device is described that provides a reflecting layer and produces the reflecting structure on the reflecting layer with multiple facets arranged in the spatial orientation to produce the flat ring optical effect. In yet another aspect, an apparatus for making the device is described that includes a pressing device and a stamping device to transfer a pattern of the reflecting structure to a reflecting material.
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